This is a sample preparation instrument based on digital microfluidic technology. It can control a set of electrodes with hydrophobic surfaces, freely manipulate droplets like writing programs, and realize complex molecular biology experiments on the chip. Based on the DNBelab D series instrument, the fully enclosed desktop new coronavirus quick detector is small, reliable, and easy to operate. It integrates magnetic bead extraction, micro-liquid manipulation, fluorescence quantification, and other functions, and can be used with qPCR, CRISPR, and other kits, effectively reducing the number of reagents and improving reaction efficiency.