The invention discloses a low-speed-start efficient composite vertical-axis fan wind wheel system capable of providing lift force. The composite vertical-axis fan wind wheel system comprises a main shaft, lift force type blades, resistance type blades and connecting rods, wherein the lift force type blades are connected with the main shaft through the connecting rods, and are uniformly distributed along the circumferential direction of the main shaft; the sections of upper connecting rods which are connected with the lift force blades are wing sections in which outer side sections are larger than inner side sections along a radius increasing direction, and upward pneumatic lift force can be generated along with the rotation of a wind wheel; the resistance type blades are arranged between the lift force type blades and the main shaft; the resistance type blades have cylindrical surfaces of which the upper and lower ends are enclosed; when the quantity of the resistance type blades is a half of or the same as the quantity of the lift force type blades, the two kinds of blades share the upper and lower connecting rods; when the quantity of the resistance type blades is different from the quantity of the lift force type blades, upper and lower connecting rods are arranged additionally, and are connected with the main shaft. The air pressure in the center of the wind wheel is kept by arranging the upper connecting rods with the wing sections, so that the pressure of the wind wheel system on a support surface is lowered; the blade profiles of the resistance type blades are improved, the air distribution structure is optimized, the starting air speed of a fan is lowered, and the running efficiency of the fan is increased.