The invention provides an antenna covering adjustment deployment method and an ultrawideband multi-mode device, and solves problems that ultrawideband multi-mode devices can not carry out antenna covering angle adjustment according to actually covered scenes in the prior art. The antenna covering adjustment deployment method is applied to the ultrawideband multi-mode device. The ultrawideband multi-mode device at least includes two antennas. The antenna covering adjustment deployment method comprises the following steps: the ultra-wideband multimode device acquires the number of sampling users in a predetermined period of time through network performance monitoring carried out on the coverage area of a base station where the ultra-wideband multimode device belongs to; the number of sampling users includes the number of users of the base station; the ultra-wideband multimode device divides the coverage area of communication cells of the base station according to the number of sampling users; and the ultra-wideband multimode device switches the antennas according to the coverage area of each communication cell to enable the horizontal covering angles of the switched antennas to cover the coverage scopes of the corresponding communication cells. The embodiment of the invention is used for the manufacturing of ultrawideband multi-mode devices.