Provided is an intelligent design of a new-type line-contact space-meshing beveloid gear. On different end sections of the beveloid gear, tooth profiles have different modification coefficients. Tooth faces of standard involute beveloid gears are involute helicoids in the case of intersecting axes or crossed axes, while line contact is impossible with respect to meshing of the involute helicoids in the case of intersecting axes and crossed axes. In order to realize line contact, by means of the space meshing theory, a tooth face equation of another gear 2 which is conjugated with a known involute beveloid gear 1 is derived from a tooth face equation of the known involute beveloid gear 1. Then, the gear is compared with a standard involute beveloid gear, the tooth profile difference and the tooth direction difference are calculated and analyzed, and gear teeth of an involute beveloid gear which is closest to the gear 2 are modified by an appropriate method. By fitting error curves, the fitting error is controlled within the required range to obtain the tooth profile of the gear 2. In this way, a pair of intersecting-axis and crossed-axis beveloid gear pair capable of realizing line contact are obtained. The gear of the present invention is used to replace an involute transmission gear.