The invention belongs to the technical field of pouring processes, and particularly relates to a basin type insulator manufacturing method. The method comprises the following steps of material injection, curing and demoulding, wherein a mold of insulators is arranged in a manner that the axis is horizontal and the sprue is upward, when the insulators are subjected to curing treatment, and heatingelements of three heating areas divided on an inner conical surface of a male mold and/or an outer conical surface of a female mold are controlled to control the temperature of the mold; and the threeareas are arranged, the mold can be well coated, and the purpose of uniform heating is achieved; different temperature zones are arranged, the curing speed of castables in the mold can be controlled,the un-formed insulators are solidified in sequence through the different temperature zones, so that the condition that the overall expansion and contraction of the insulators is not uniform is relieved; and in this way, the temperature of each part of the mold is controlled, the solidification of the insulators is more uniform correspondingly, the defects such as shrinkage marks and holes existing in the produced insulators are greatly reduced, and the forming quality is higher.