The invention relates to a seamless silica gel conveying belt. The conveying belt forms a closed hybrid layer by a joint-free closed base belt and silica gel, an outer silica gel layer is designed onthe outer surface of the closed hybrid layer, and the closed hybrid layer and the outer silica gel layer are integrally molded into a whole in such a way that liquid silica gel is poured and spread onthe joint-free closed base belt. The manufacture method of the conveying belt comprises the following steps: (1) connecting the head and the tail of a plane strip base belt to be woven into the joint-free closed base belt; (2) mounting the joint-free closed base belt on a gel spreading machine; (3) starting the gel spreading machine, pouring the liquid silica gel on the joint-free closed base belt and spreading the liquid silica gel by a scraper on the gel spreading machine; (4) after the silica gel is solidified, abrading the outer surface of the outer silica gel layer by an abrading machine; (5) taking the product out of the machine and putting into a warehouse. The seamless silica gel conveying belt produced by the method has seamless integration and high strength and quality without sticking a conveying object and meets the requirement of a super wide and/or a super long product by a user. The manufacture method has simpler working procedures.