The invention relates to a forming process of a filter core supporting bowl. The forming process comprises the following steps: feeding: through the calculation of the required size, a circular plateis processed by using a plasma cutting machine or a punching machine and fed; forming: after the feeding operation is finished, the above plate is put into a stretch forming die, and a semi-finished product of the filter core supporting bowl subjected to primary forming is manufactured; tapered surface stretching: the above semi-finished product is sent to a tapered stretching die for tapered surface stretching, and the filter core supporting bowl subjected to secondary forming is formed; punching: the above filter core supporting bowl is sent to a punching die, and a punching tool I positioned at the lower part is adopted for upward punching after the upper part is fixed; flanging: the punched filter core supporting bowl is sent to a flanging die, and a pressure head III positioned at thelower part is adopted for upward pressure application and flanging after an upper die is pressed; and side punching: the flanged filter core supporting bowl is moved to a side punching saw-edge die,a rotary fixing frame is driven by a motor to rotate, the angle of each rotation is 90 degrees, a punching tool II is adopted for downward punching, and the final filter core supporting bowl is obtained after punching for four times.