Constant-pressure stable heat transfer printing method of manual heat transfer printing machine for flexible material

The invention discloses a constant-pressure stable heat transfer printing method of a manual heat transfer printing machine for a flexible material. The method mainly comprises the following steps that S1, a heating plate is preheated; S2, a heat transfer printing bearing part is laid; S3, the pressure is set; and S4, heat transfer printing is conducted. The invention further relates to the constant-pressure stable heat transfer printing machine in the heat transfer printing process. The constant-pressure stable heat transfer printing machine comprises a fixing base and a base. A base plate isinstalled on the fixing base in a rotating mode through a rotating rod, and an upper plate is fixedly installed at the end, far away from the fixing base, of the base plate. The heating plate and twoside plates are fixedly arranged on the lower surface of the upper plate, and the two side plates are symmetrically distributed on the two sides of the heating plate. A transverse plate is horizontally installed in the fixing