The utility model relates to combined type colorful building blocks which are formed by combining ball pieces, connecting rods, turtle head blades, magnetic columns, magnetic cones and the like. The combined type colorful building blocks overcome the defects that by the adoption of most blocks, a circle is hard to splice, and a spliced product is similar to a circle under the condition of special fixing pieces. According to the combine type colorful building blocks, a circle and a square can be more easily converted, the ball pieces are arranged so that a circle can be formed, a square can be formed through the connection rods which are matched with the arc lines of the turtle head blades, joint connection between the magnetic columns and the magnetic cones and decoration of the magnetic columns and the magnetic cones; in the three-dimensional axial direction, each connecting rod can extend and be lengthened frontwards, backwards, upwards and downwards through magnets at the two ends, the two ends of each connecting rod can extend leftwards and rightwards in the axial direction through the increase of the number of the magnetic columns at the two ends, and then extension is achieved in a three-dimensional space; the ball pieces, the connecting rods, the turtle head blades, the magnetic columns and the magnetic cones are connected in various modes, and therefore the combined type colorful building blocks can be combined into more abundant lively shapes.