Pedal gear transmission tricycle

A pedal gear transmission tricycle comprises a body, handlebars, a front wheel, rear wheels and a seat; a center shaft of the two rear wheels is connected with a differential mechanism; two transmission gears are arranged on the bilateral sides of the differential mechanism respectively; the transmission gears are connected with the differential mechanism through nullable ratchet wheels; each transmission gear is meshed with and matched with a large gear; the two large gears are fixedly connected with pedals which are located on the bilateral sides of the body respectively and used for driving the large gears to rotate in a reciprocating mode. According to the pedal gear transmission tricycle, the driving can be labor-saving, the transmission is reliable, and the turning can be flexible due to the differential mechanism; the reciprocating motion pedal driving mode can be possible due to a ratchet wheel mechanism and the internal meshing combination structure; compared with the pedal mode in the prior art, the